Stomatal Sensitivity to Vapor Pressure Deficit and the Loss of Hydraulic Conductivity Are Coordinated in Populus euphratica, a Desert Phreatophyte Species

Increasing stomatal closure was exhibited by two conifer and six broadleaf species as vapor pressure deficit increased. Conifers were more sensitive to high vapor pressure deficit than were the broadleaved species. One shrub, snowbrush (Ceanothusvelutinus Dougl. ex Hook.), exhibited no stomatal closure as vapor pressure deficit increased. These traits, when interpreted in terms of known soil moisture depletion patterns, help explain why broadleaved species initially colonize disturbed areas in western Oregon, but are later replaced by long-lived conifers.

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Limited Phenotypic Variation in Vulnerability to Cavitation and Stomatal Sensitivity to Vapor Pressure Deficit among Clones of Aristotelia chilensis from Different Climatic Origins

Plants ◽

10.3390/plants10091777 ◽

2021 ◽

Vol 10 (9) ◽

pp. 1777

Author(s):

Marco A. Yáñez ◽

Javier I. Urzua ◽

Sergio E. Espinoza ◽

Victor L. Peña

Keyword(s):

Vapor Pressure ◽

Food Industry ◽

Vapor Pressure Deficit ◽

Climate Change Scenario ◽

Change Scenario ◽

Potted Plants ◽

Vulnerability To Cavitation ◽

Comparable Performance ◽

Aristotelia Chilensis ◽

Stomatal Sensitivity

Aristotelia chilensis (Molina) Stuntz is a promising species in the food industry as it provides ‘super fruits’ with remarkable antioxidant activity. However, under the predicted climate change scenario, the ongoing domestication of the species must consider selecting the most productive genotypes and be based on traits conferring drought tolerance. We assessed the vulnerability to cavitation and stomatal sensitivity to vapor pressure deficit (VPD) in A. chilensis clones originated from provenances with contrasting climates. A nursery experiment was carried out for one growing season on 2-year-old potted plants. Measurements of stomatal conductance (gs) responses to VPD were taken in spring, summer, and autumn, whereas vulnerability to cavitation was evaluated at the end of spring. Overall, the vulnerability to cavitation of the species was moderate (mean P50 of −2.2 MPa). Parameters of the vulnerability curves (Kmax, P50, P88, and S50) showed no differences among clones or when northern and southern clones were compared. Moreover, there were no differences in stomatal sensitivity to VPD at the provenance or the clonal level. However, compared with other studies, the stomatal sensitivity was considered moderately low, especially in the range of 1 to 3 kPa of VPD. The comparable performance of genotypes from contrasting provenance origins suggests low genetic variation for these traits. Further research must consider testing on diverse environmental conditions to assess the phenotypic plasticity of these types of traits.

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Stomatal sensitivity to vapor pressure deficit and its relationship to hydraulic conductance in Pinus palustris

Tree Physiology ◽

10.1093/treephys/24.5.561 ◽

2004 ◽

Vol 24 (5) ◽

pp. 561-569 ◽

Cited By ~ 79

Author(s):

R. N. Addington ◽

R. J. Mitchell ◽

R. Oren ◽

L. A. Donovan

Keyword(s):

Vapor Pressure ◽

Vapor Pressure Deficit ◽

Pinus Palustris ◽

Hydraulic Conductance ◽

Stomatal Sensitivity

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Effect of Mycorrhizal Fungi on Gas Exchange of Micropropagated Guava Plantlets (Psidium guajava L.) during Acclimatization and Plant Establishment

HortScience ◽

10.21273/hortsci.33.3.501c ◽

1998 ◽

Vol 33 (3) ◽

pp. 501c-501

Author(s):

Andrés A. Estrada-Luna ◽

Jonathan N. Egilla ◽

Fred T. Davies

Keyword(s):

Tissue Culture ◽

Stomatal Conductance ◽

Gas Exchange ◽

Vapor Pressure ◽

Mycorrhizal Fungi ◽

Vapor Pressure Deficit ◽

Psidium Guajava ◽

Glomus Etunicatum ◽

Plant Establishment ◽

Use Efficiency

The effect of mycorrhizal fungi on gas exchange of micropropagated guava plantlets (Psidium guajava L.) during acclimatization and plant establishment was determined. Guava plantlets (Psidium guajava L. cv. `Media China') were asexually propagated through tissue culture and acclimatized in a glasshouse for eighteen weeks. Half of the plantlets were inoculated with ZAC-19, which is a mixed isolate containing Glomus etunicatum and an unknown Glomus spp. Plantlets were fertilized with modified Long Ashton nutrient solution containing 11 (g P/ml. Gas exchange measurements included photosynthetic rate (A), stomatal conductance (gs), internal CO2 concentration (Ci), transpiration rate (E), water use efficiency (WUE), and vapor pressure deficit (VPD). Measurements were taken at 2, 4, 8 and 18 weeks after inoculation using a LI-6200 portable photosynthesis system (LI-COR Inc. Lincoln, Neb., USA). Two weeks after inoculation, noninoculated plantlets had greater A compared to mycorrhizal plantlets. However, 4 and 8 weeks after inoculation, mycorrhizal plantlets had greater A, gs, Ci and WUE. At the end of the experiment gas exchange was comparable between noninoculated and mycorrhizal plantlets.

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Is There Daily Growth Hysteresis versus Vapor Pressure Deficit in Cherry Fruit?

Horticulturae ◽

10.3390/horticulturae7060131 ◽

2021 ◽

Vol 7 (6) ◽

pp. 131

Author(s):

Matteo Zucchini ◽

Arash Khosravi ◽

Veronica Giorgi ◽

Adriano Mancini ◽

Davide Neri

Keyword(s):

Vapor Pressure ◽

Vapor Pressure Deficit ◽

Fruit Growth ◽

Hysteresis Curve ◽

Growth Stages ◽

Fourth Stage ◽

The Third ◽

Third Stage ◽

Rainy Days ◽

Clockwise Hysteresis

The growth of cherry fruit is generally described using a double sigmoid model, divided into four growth stages. Abiotic factors are considered to be significant components in modifying fruit growth, and among these, the vapor pressure deficit (VPD) is deemed the most effective. In this study, we investigated sweet cherry fruit growth through the continuous, hourly monitoring of fruit transversal diameter over two consecutive years (2019 and 2020), from the beginning of the third stage to maturation (forth stage). Extensometers were used in the field and VPD was calculated from weather data. The fruit growth pattern up to the end of the third stage demonstrated three critical steps during non-rainy days: shrinkage, stabilization and expansion. In the third stage of fruit growth, a partial clockwise hysteresis curve of circadian growth, as a response to VPD, appeared on random days. The pattern of fruit growth during rainy days was not distinctive, but the amount and duration of rain caused a consequent decrease in the VPD and indirectly boosted fruit growth. At the beginning of the fourth stage, the circadian growth changed and the daily transversal diameter vs VPD formed fully clockwise hysteresis curves for most of this stage. Our findings indicate that hysteresis can be employed to evaluate the initial phenological phase of fruit maturation, as a fully clockwise hysteresis curve was observable only in the fourth stage of fruit growth. There are additional opportunities for its use in the management of fruit production, such as in precision fruit farming.

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Towards In Vivo Monitoring of Ions Accumulation in Trees: Response of an in Planta Organic Electrochemical Transistor Based Sensor to Water Flux Density, Light and Vapor Pressure Deficit Variation

Applied Sciences ◽

10.3390/app11114729 ◽

2021 ◽

Vol 11 (11) ◽

pp. 4729

Author(s):

Davide Amato ◽

Giuseppe Montanaro ◽

Filippo Vurro ◽

Nicola Coppedé ◽

Nunzio Briglia ◽

...

Keyword(s):

Vapor Pressure ◽

Flux Density ◽

Precision Agriculture ◽

Vapor Pressure Deficit ◽

Accumulation Rate ◽

Xylem Sap ◽

Water Flux ◽

Electrochemical Transistor ◽

Olive Trees

Research on organic electrochemical transistor (OECT) based sensors to monitor in vivo plant traits such as xylem sap concentration is attracting attention for their potential application in precision agriculture. Fabrication and electronic aspects of OECT have been the subject of extensive research while its characterization within the plant water relation context deserves further efforts. This study tested the hypothesis that the response (R) of an OECT (bioristor) implanted in the trunk of olive trees is inversely proportional to the water flux density flowing through the plant (Jw). This study also examined the influence on R of vapor pressure deficit (VPD) as coupled/uncoupled with light. R was hourly recorded in potted olive trees for a 10-day period concomitantly with Jw (weight loss method). A subgroup of trees was bagged in order to reduce VPD and in turn Jw, and other trees were located in a walk-in chamber where VPD and light were independently managed. R was tightly sensitive to diurnal oscillation of Jw and at negligible values of Jw (late afternoon and night) R increased. The bioristor was not sensitive to the VPD per se unless a light source was coupled to trigger Jw. This study preliminarily examined the suitability of bioristor to estimate the mean daily nutrients accumulation rate (Ca, K) in leaves comparing chemical and sensor-based procedures showing a good agreement between them opening new perspective towards the application of OECT sensor in precision agricultural cropping systems.

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Grape Berry Transpiration Is Determined by Vapor Pressure Deficit, Cuticular Conductance, and Berry Size

American Journal of Enology and Viticulture ◽

10.5344/ajev.2015.15038 ◽

2015 ◽

Vol 66 (4) ◽

pp. 454-462 ◽

Cited By ~ 19

Author(s):

Y. Zhang ◽

M. Keller

Keyword(s):

Vapor Pressure ◽

Vapor Pressure Deficit ◽

Grape Berry ◽

Berry Size

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Effect of vapor pressure deficit on the photosynthesis, growth, and nutrient absorption of tomato seedlings

Scientia Horticulturae ◽

10.1016/j.scienta.2021.110736 ◽

2021 ◽

pp. 110736

Author(s):

Juping Ding ◽

Xiaocong Jiao ◽

Ping Bai ◽

Yixin Hu ◽

Jiayu Zhang ◽

...

Keyword(s):

Vapor Pressure ◽

Vapor Pressure Deficit ◽

Nutrient Absorption ◽

Tomato Seedlings

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Transpiration Response to Vapor Pressure Deficit in Field Grown Peanut

Peanut Science ◽

10.3146/ps11-13.1 ◽

2012 ◽

Vol 39 (1) ◽

pp. 53-61 ◽

Cited By ~ 6

Author(s):

Maria Balota ◽

Steve McGrath ◽

Thomas G. Isleib ◽

Shyam Tallury

Keyword(s):

Vapor Pressure ◽

Soil Water ◽

Water Deficit ◽

Water Conservation ◽

Vapor Pressure Deficit ◽

Stomatal Closure ◽

Genotypic Variation ◽

Moisture Stress ◽

Breeding Lines ◽

Wide Range

Abstract Water deficit, i.e., rainfall amounts and distribution, is the most common abiotic stress that limits peanut production worldwide. Even though extensive research efforts have been made to improve drought tolerance in peanut, performance of genotypes largely depends upon the environment in which they grow. Based on greenhouse experiments, it has been hypothesized that stomata closure under high vapor pressure deficit (VPD) is a mechanism of soil water conservation and it has been shown that genotypic variation for the response of transpiration rate to VPD in peanut exists. The objective of this study was to determine the relationship between stomatal conductance (gs) and VPD for field grown peanut in Virginia-Carolina (VC) rainfed environments. In 2009, thirty virginia-type peanut cultivars and advanced breeding lines were evaluated for gs at several times before and after rain events, including a moisture stress episode. In 2010, eighteen genotypes were evaluated for gs under soil water deficit. In 2009, VPD ranged from 1.3 to 4.2 kPa and in 2010 from 1.78 to 3.57 kPa. Under water deficit, genotype and year showed a significant effect on gs (P = 0.0001), but the genotype × year interaction did not. During the water deficit episodes while recorded gs values were relatively high, gs was negatively related to VPD (R2 = 0.57, n = 180 in 2009; R2 = 0.47, n = 108 in 2010), suggesting that stomata closure is indeed a water conservation mechanism for field grown peanut. However, a wide range of slopes among genotype were observed in both years. Genotypes with significant negative relationships of gs and VPD under water deficit in both years were Florida Fancy, Gregory, N04074FCT, NC-V11, and VA-98R. While Florida Fancy, Gregory, and NC-V11 are known to be high yielding cultivars, VA-98R and line N04074FCT are not. The benefit of stomatal closure during drought episodes in the VC environments is further discussed in this paper.

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